LED Drivers with LVDS achieve High-Speed and Long-Distance
THine Electronics, Inc. today announced new LED drivers with LVDS interface, THL3512 and THL3514, starting distribution of its samples for customers. These new products have the serial interface of 2-pair LVDS lines (clock and data) and achieve higher-level noise tolerance, high-speed and long-distance transmission. THL3512/3514 can reduce the possibility of an incorrect action or improper LED lighting, expanding the transmitting distance. In addition, these new LED drivers have controlling function of gradation. Applications are expected to embrace a wide variety of systems including: Amusement, LED Backlight, LED display, LED billboard lighting, Digital signage, and General Illumination.
THL3512 has 24-channel open drain outputs. THL3514 has 24-channel constant current sink outputs and its constant current values for three output groups are determined by external resisters. Each of these new LED drivers has an embedded oscillator and PWM controller that individually generates 256-step brightness set by the dedicated registers for each channel. The LVDS allowing cascaded and multi-drop connection offers the maximum flexibility for designers to place and connect LED drivers. The simple and one-way communication protocol is easily-controlled and requires less CPU resources.
Features of the driver section in the THL3512/3514 include: Open-drain output, 24 channels (THL3512); Constant current outpu, 24 channel (THL3514); Output sink current up to 100mA/ch (THL3512), 40mA/ch (THL3514); Output voltage up to 40V; Individual brightness control 256 steps; Output disable / enable.
Features of the serial interface section of the THL3512/3514 include: 2-pair serial LVDS input or 3-wire serial CMOS input: up to 10Mbps; Bridge function converting 3-wire serial CMOS input to 2-pair serial LVDS output; Repeater function of 2-pair serial LVDS input / output with waveform and timing correction; Device address selection includes up to 62 address and General call to all devices. Protection circuits include: UVLO, short circuit protection, and thermal shutdown. The supply voltage is 3.0 to 5.5Vdc. These devices are delivered in a QFN 48-pin exposed pad package.
